If you want to give more rank point to search words entered by the user versus rank points given to documents independent of search word used, you should increase the overall weight of the dynamic rank components. You do this by reducing the overall weight of the quality, or static rank components.

On the Start menu, click All Programs.

Click Microsoft FAST Search Server 2010 for SharePoint.

Click Microsoft FAST Search Server 2010 for SharePoint shell.

At the Windows PowerShell command prompt, type the following command(s):